42177828 has 72 divisors (see below), whose sum is σ = 124909344. Its totient is φ = 10953600.

The previous prime is 42177823. The next prime is 42177829. The reversal of 42177828 is 82877124.

It is not an unprimeable number, because it can be changed into a prime (42177823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3208 + ... + 9728.

It is an arithmetic number, because the mean of its divisors is an integer number (1734852).

Almost surely, 2^42177828 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42177828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62454672).

42177828 is an abundant number, since it is smaller than the sum of its proper divisors (82731516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42177828 is a wasteful number, since it uses less digits than its factorization.

42177828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6553 (or 6544 counting only the distinct ones).

The product of its digits is 50176, while the sum is 39.

The square root of 42177828 is about 6494.4459347969. The cubic root of 42177828 is about 348.0925569634.

The spelling of 42177828 in words is "forty-two million, one hundred seventy-seven thousand, eight hundred twenty-eight".